CVE-2022-49285

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49285
In the Linux kernel, the following vulnerability has been resolved: iio: accel: mma8452: use the correct logic to get mma8452_data The original logic to get mma8452_data is wrong, the *dev point to the device belong to iio_dev. we can't use this dev to find the correct i2c_client. The original logic happen to work because it finally use dev->driver_data to get iio_dev. Here use the API to_i2c_client() is wrong and make reader confuse. To correct the logic, it should be like this struct mma8452_data *data = iio_priv(dev_get_drvdata(dev)); But after commit 8b7651f25962 ("iio: iio_device_alloc(): Remove unnecessary self drvdata"), the upper logic also can't work. When try to show the avialable scale in userspace, will meet kernel dump, kernel handle NULL pointer dereference. So use dev_to_iio_dev() to correct the logic. Dual fixes tags as the second reflects when the bug was exposed, whilst the first reflects when the original bug was introduced.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/4c0bb583a4444cce224e8661090cbffc98e2fe07 Patch
https://git.kernel.org/stable/c/c87b7b12f48db86ac9909894f4dc0107d7df6375 Patch
https://git.kernel.org/stable/c/d2d9ebdbff79d87d27652578e6d1638ad3b5f3bf Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

22 Sep 2025, 20:45

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: accel: mma8452: usa la lógica correcta para obtener mma8452_data La lógica original para obtener mma8452_data es incorrecta, el punto *dev al dispositivo pertenece a iio_dev. No podemos usar este dev para encontrar el i2c_client correcto. La lógica original funcionó porque finalmente usó dev->driver_data para obtener iio_dev. Aquí, usar la API to_i2c_client() es incorrecto y confunde al lector. Para corregir la lógica, debería ser así struct mma8452_data *data = iio_priv(dev_get_drvdata(dev)); Pero después de el commit 8b7651f25962 ("iio: iio_device_alloc(): eliminar drvdata propios innecesarios"), la lógica superior tampoco puede funcionar. Cuando se intenta mostrar la escala disponible en el espacio de usuario, se produce un volcado del kernel y una desreferencia del puntero NULL del manejador del kernel. Por lo tanto, se utiliza dev_to_iio_dev() para corregir la lógica. Dual corrige las etiquetas, ya que la segunda refleja cuándo se expuso el error, mientras que la primera refleja cuándo se introdujo el error original.
References () https://git.kernel.org/stable/c/4c0bb583a4444cce224e8661090cbffc98e2fe07 - () https://git.kernel.org/stable/c/4c0bb583a4444cce224e8661090cbffc98e2fe07 - Patch
References () https://git.kernel.org/stable/c/c87b7b12f48db86ac9909894f4dc0107d7df6375 - () https://git.kernel.org/stable/c/c87b7b12f48db86ac9909894f4dc0107d7df6375 - Patch
References () https://git.kernel.org/stable/c/d2d9ebdbff79d87d27652578e6d1638ad3b5f3bf - () https://git.kernel.org/stable/c/d2d9ebdbff79d87d27652578e6d1638ad3b5f3bf - Patch
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-476

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-09-22 20:45

NVD link : CVE-2022-49285

Mitre link : CVE-2022-49285

CVE.ORG link : CVE-2022-49285

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference